A 10x spread on a 6D game would still be a moneymaker, but fairly small advantage, under 1%. This means that your short and medium term results are going to be virtually all variance.
As for trip bankroll, I don't have any hard numbers for you, but I just dropped $5k in about an hour and a half witha $300 max bet.
Unless your previous bet spread was very similar, I strongly recommend running some numbers just to get an idea of what you're up against. The qfit.com site, Blackjack Attack, or running a sim are a good way to go.
And as for heat... well, that depends on where you're playing. At some joints, it will freak people out. I think the best idea here would be to compare against what level you played at before.